I watched the first season, haven't read, and don't know if I wanna continue watching the second season but
If we go only by the first season, Nino would be last for me. But she gets some development in the second so fourth is alright.
I just personally find Itsuki kinda annoying and I was cheering on for Nino to find out Uesugi was that blonde boy lol I gave up watching the fourth season I just wanna know who he marries lmao